Nut lock



April 21, 1931. G. P. HURST NUT LOCK Filed July 3, 1929 Patented Apr. 21, 1931 1,801,505

series GEORGE P. HUIBST, OF RAPID CITY, SGUTZ-I DAKOTA, ASSEGNOR OF ONE-HALF TO B. SNYDER, (3F RAPID CITY, SG'U'IH DAKOTA rrnn stares are,

NUT LOCK Application filed July 3, 1929. Serial No. 375,708.

This invention relates to nut and bolt locks, the grooves 4 of the shank' 2 without extendand one object of the invention is to provide ing into the path of the threads and, therea device of this character which is simple in fore, the nut may be. applied in the usual construction and may be very easily applied manner and screwed tightly into place. The 5 and securely retain the nut tightened but at arms are of greater length than the shank of the same time allow it to be released if necesthe bolt and, therefore, when first applied, sary. they project from the free end of the shank so Another object of the invention is to so that after the nut has been fully tightened the form this lock that not only will the not be projecting ends of the arms may be easily 10 prevented from loosening but also the bolt grasped and these arms bent across the outer held against turning when the lock is fasface of the nut and into flat contacting entened. gagement with opposed side faces of the nut, The invention is illustrated in the accoinas shown at 11. By this arrangement the nut panyin drawing, wherein may be securely held against loosening and 15 Figure l is a perspective view showing a since the arms extend through the grooves in out secured by the improved lock, the shank of the bolt the bolt will be pre- Fig. 2 is a sectional view taken longitudivented from turning in the nut. Therefore, nally through the bolt, the nut and bolt will be firmly locked in a set Fig. 3 is a perspective view of the locking position. When it is desired to remove the 20 device, and nut, it is merely necessary to rebend the ends Fig. 4 is a perspective view of a modified of the arms and the nut can be easily unform of the invention. screwed.

The bolt, which is indicated in general by The locking device shown in Fig. 4 is the numeral 1, consists of the usual shank 2 slightly different from the form shown in Fig.

2 which is threaded and has a head 3 at one end. 3. In this form of the invention, the disk Grooves 4 are formed longitudinally in the consists of separate segments 12 which pref-V shank of the bolt in opposed relation to each erably form a complete circle, although they other and are of greater depth than the may be less than a circle and terminate in threads so that securing arms of a fastener spaced relation to each other so that they so may extend through these grooves without may be applied to bolts of different diame- S0 interfering with application or removal of ters. Arms 13 are carried by the segments 12 the nut 5 which is to be screwed upon the bolt but instead of extending from their outer and tightened until articles, such as the bars edges they are joined to the segments at their 6, through which the bolt passes will be firmly inner edges and, therefore, do not extend 35 gripped between the nut and the head of the across the segments when they are bent to bolt. project longitudinally of the bolt. When The fastener or lock by means of which the this form of locking device is in use, the segnut is to be secured may be formed either as ments are applied against the inner face of shown in Fig. 3 or as shown in Fig. e. In the the bolt head with the arms 13 extending form shown in Fig. 8, the lock consists of a longitudinally of the shank and fitting into circular disk 7 formed with center opening the grooves. The nut is applied and tight- 8 of the proper diameter to receive the shank ened as previously set forth and after the nut of the bolt and from opposit portions of this has been sufficiently tightened the free ends disk extend strips which are bent inwardly of the arms are bent to extend across the towards the opening 8, as shown at 9, ant outer end face of the nut and bear against opthrough this opening so that they project posed side faces thereof. It will thus be seen from the inner circumference of the disk or that the operation is similar to that previouswasher at opposite sides of the center opening ly described.

to form arms 10. These arms are of the I have, therefore, provided a nut lock proper width and thickness to be received in which may be easily applied to a bolt and by means of which a nut may be firmly secured in a set position but allowed to be released when necessary. It will be further noted that the nut lock is simple in its construction and cheap to produce.

Having thus described the invention, I claim:

In a nut lock, a bolt having a threaded shank formed with longitudinally extending grooves, a head at one end of said shank, a nut screwed upon said shank, and means to secure said nut in a set position upon said shank consisting of a disk adapted to fit against the inner face of said head and formed with an opening to receive said shank, strips extending from the outer margin of said disk and bent inwardly across the disk and through the opening thereof to provide arms extending through the grooves of said shank, the arms being of greater length than the shank and adapted to have their end portions bent across the outer face of the nut and against side faces thereof to secure the nut in a set position. In testimony whereof I afiix my signature.

GEORGE P. HURST. [L.S.] 

